rounds up to a whole number cout<<ceil(11.2);(prints 12)(not normal rounding)

floor(x)

double floor(double x);

rounds down to a whole
numbercout<<floor(11.5);
(prints 11)(not normal rounding)

hypot(a,b)

double hypot(double a,
double b);

calculates the
hypotenuse (c) of a right triangle where a and b are the legs.

pow(x,y)

double pow(double x,
double y);

calculates x to the
power of y. If x is negative, y must be an integer. If x is
zero, y must be a positive integer.

pow10(x)

double pow10(int x);

calculates 10 to the
power of x.

sqrt(x)

double sqrt(double x);

calculates the positive
square root of x.
(x is >=0)

fmod(x,y)

double fmod(double x,
double y);

returns floating point
remainder of x/y with same sign as x. Y cannot be zero.
Because the modulus operator(%) works only with integers, this function
is used to find the remainder of floating point number division.

<math.h>

NOTE:The trigonometric functions work with
angles in radians rather than
degrees.

All of the trigonometric
functions take double arguments and have double return types.